Shower Waterproofing
Membrane systems for shower recesses with wall coverage up to 1800mm, sealed corners and bond breakers that prevent membrane failure.
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Protect your bathroom from hidden leaks, mould and structural damage. Licensed Sydney waterproofers delivering AS 3740 compliant showers, ensuites, bathtubs and bathroom floors, backed by a 10-year warranty.
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Bathrooms are the most moisture-prone area of any property. Without a correctly installed waterproof membrane, water can seep through tiles, grout and concrete, leading to mould, rotting timber and costly structural damage that often goes unnoticed for months.
At Sydney One Waterproofing, we install AS 3740 compliant systems that protect your bathroom from the source. Every shower recess, floor, wall junction and pipe penetration is sealed using proven membrane systems engineered to handle Sydney's humidity and daily wet-area use.
From a single shower recess to a full ensuite or bathroom rebuild, our licensed crews waterproof every wet area to AS 3740 standards.
Membrane systems for shower recesses with wall coverage up to 1800mm, sealed corners and bond breakers that prevent membrane failure.
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Full floor membrane application with proper falls, sealed drains and wall upturns. Compliant with AS 3740 across the entire wet area footprint.
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Waterproofing behind tiles and around wet area walls to stop moisture seeping into adjacent rooms, framing and plasterboard.
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Sealed bathtub surrounds with proper flashings and silicone joints. Stops leaks at the tub edge before they reach floors or wall cavities.
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Compact ensuites need precise membrane work in tight spaces. We deliver clean, code-compliant ensuite waterproofing with minimal disruption.
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Targeted waterproofing for toilets, powder rooms and laundries. Protects against slow leaks from pan connectors and floor wastes.
Get a quote →Catching the warning signs early can save thousands in repair costs. If you spot any of these in your bathroom, book a moisture inspection before damage spreads.
Visible damp or discoloured patches on bathroom walls or adjoining rooms are an early sign of membrane failure.
Tiles that lift, shift or sound hollow when tapped usually mean water has reached the substrate underneath.
Persistent black mould around grout lines, silicone seals or tile edges signals trapped moisture behind the surface.
A lingering musty odour, even after cleaning, often points to hidden water sitting behind walls or under floors.
Paint that peels, bubbles or flakes on bathroom ceilings or walls is moisture working its way through the surface.
Brown rings or stains on the ceiling beneath an upper-level bathroom are a clear sign of waterproofing failure above.
We start with a thorough inspection of the bathroom substrate to identify cracks, gaps and problem areas. Surfaces are cleaned, repaired and primed for membrane adhesion.
All wall and floor junctions, corners and pipe penetrations are sealed. Bond breakers and reinforcing fabric are applied to prevent membrane failure from structural movement.
A flexible, liquid-applied membrane is installed across shower walls to 1800mm minimum, the entire floor, door thresholds and around all drains, wastes and fixtures.
A second membrane coat is applied to guarantee complete protection. Drying times are strictly observed between coats as per manufacturer guidelines and AS 3740.
A thorough quality check confirms uniform coverage before we hand over your written 10-year warranty and compliance certificate for total peace of mind.
Every bathroom we waterproof meets the latest Australian Standards, the National Construction Code and NSW Fair Trading requirements.
Waterproofing of Domestic Wet Areas
Licensed waterproofing contractor
NCC compliant wet area systems
Certified application for full warranty
Real reviews from Sydney homeowners and builders who trusted us with their bathroom waterproofing.
"Had a persistent leak in our main bathroom that two other guys couldn't fix. The Sydney One crew diagnosed it on day one, rewaterproofed the entire shower, and the finish was spotless. No more damp patches months later."
"Full ensuite waterproofing on our renovation. Professional from quote to handover, fully AS 3740 compliant, and the written warranty gave us real peace of mind. The compliance certificate also kept our certifier happy."
"Used Sydney One for three bathrooms on a townhouse build. Clean workmanship, on schedule and zero callbacks after handover. We trust them with every project that comes our way now."
From single-bathroom renovations to multi-level commercial sites, our crews deliver tested waterproofing systems that hold up to Sydney's coastal climate.
Discuss Your ProjectHomes, townhouses, and renovations. Compliant waterproofing for bathrooms, balconies, kitchens and laundries.
Offices, retail and hospitality fitouts. Minimal disruption with after-hours job options across Sydney.
Apartment buildings, common areas and remediation. We coordinate with strata managers from start to handover.
Builders and developers trust us for code-compliant waterproofing across new builds and large-scale projects.
Bathroom waterproofing should never be the place to cut corners. A poorly installed membrane costs many times more in repairs, tile replacement and structural rectification down the line. We deliver work that is built to last, priced fairly, and quoted transparently with no hidden costs.
Every quote we send includes the full system specification, a written warranty and a compliance certificate. No surprises, no shortcuts.
We respond within 24 hours, Monday to Saturday.
Common questions about bathroom waterproofing in Sydney. Still curious? Our team is one call away.
Talk to a SpecialistYour trusted partner for expert waterproofing solutions, ensuring long-lasting protection for your home and business from water damage.
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